Photothermal catalysis has been proposed as a promising alternative to conventional photocatalysis and thermocatalysis in the fields of energy preparation and environmental remediation, attributing to the unprecedented light harvesting efficiency and superior throughputs under moderate reaction conditions [1]. It is basically a multiple energy complementary technology integrating solar energy mediated photochemical process and solar light induced thermocatalysis. Specifically, the photo-excited energetic hot carriers via intraband or interband extinction (also called Landau damping) can directly initiate chemical reactions at much milder conditions. And the hot carriers failing to participate the redox reactions will be cooled into heat by thermalization (also named Ohmic damping) [2]. The photo-excited hot carriers can reduce the reaction barrier and improve the reaction selectivity, while the photo-generated internal heat can thermodynamically accelerate reaction rates and ginger up the sluggish hot carriers. Therefore, photothermal catalysis has compensated the disadvantages of photocatalysis and thermocatalysis, and significantly boosted the reaction rates to a level of industrialization by taking advantage of full-spectrum solar light, showing significant potentials on large-scale production of solar fuels [3]. Here, we present our ongoing researches in harnessing the full spectrum solar energy using the photothermal catalytic strategy to drive CO2 reduction with alkane or hydrogen. Using solar energy to catalytically reduce CO2 and upgrade conventional fossil fuels has the potential to convert the waste of CO2 into high value-added chemical fuels and feedstocks in a clean and sustainable manner, allowing the dual opportunity to store the intermittent renewable energy as well as closing the anthropogenic carbon cycle.